First lines of code are fields. Fields are simply variables defined within a class, outside the scope of a method (a variable, but with scope that extends outside of a given method). They can be private like we have in the Car example, or they can be public.

Ideally, you should never use Public Fields, but rather use Public Properties instead. We'll talk about that more in a moment, but let’s add three more BEST PRACTICEs to our ongoing list: